Some of the sentences have errors and some have none. Find out which part of a sentence has an error, and the appropriate letter $\text{(A), (B), (C)}$ is your answer. If there is no error, $\text{(D)}$ is the answer.
$\underset{\text{(A)}}{\text{Even some people who have tickets}}/ \underset{\text{(B)}}{\text{aren't able to}}/\underset{\text{(C)}}{\text{get into the stadium.}}/\underset{\text{(D)}}{\text{No error}}$